Results 211 to 220 of about 56,020 (266)

Resonant frequency of dielectric resonator

Proceedings RAWCON 98. 1998 IEEE Radio and Wireless Conference (Cat. No.98EX194), 2002
In this paper, an effective dielectric constant (EDC) has been introduced in an axial attenuation constant of dielectric waveguide model (DWM) method to calculate more accurately the resonant frequency of the TE/sub 01/spl delta// mode of a dielectric resonator (DR) in an MIC environment.
null Juseop Lee, null Sang-Min Han, null Young-Sik Kim   +2 more
openaire   +1 more source

Resonant frequencies of helical resonators

15th International Conference on Microwaves, Radar and Wireless Communications (IEEE Cat. No.04EX824), 2004
The paper investigates the resonant frequencies of helical resonators. Full-wave 3D electromagnetic analysis is used to verify closed-form formulas known from literature. Corrections to formulas for dominant mode and new formulas for higher modes are proposed. Two-helical resonators filter was designed and measured.
J. Antoniuk, M. Zukocinski, A. Abramowicz, W. Gvvarek   +3 more
openaire   +1 more source

Theory of the rooftop resonator: resonant frequencies and eigenpolarizations

Applied Optics, 1983
The eigenpolarizations and resonant frequencies are derived for a circular dielectric waveguide resonator (EH11 mode) terminated by perfectly reflecting metallic rooftop mirrors. It is demonstrated that, in the far-IR region, circularly polarized helical standing waves result from an arbitrary angular misalignment of the rooftop creases.
D K, Mansfield, K, Jones, L C, Johnson, A, Semet   +3 more
openaire   +2 more sources

Flapping frequency and resonant frequency of insect wings

2013 10th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI), 2013
In this study, we experimentally studied the relationship between wingbeat frequency and resonant frequency of 30 individuals of eight insect species from five families: Odonata (Sympetrum flaveolum), Lepidoptera (Pieris rapae, Plusia gamma and Ochlodes), Hymenoptera (Xylocopa pubescens and Bombus rupestric), Hemiptera (Tibicen linnei) and Coleoptera ...
Ngoc San Ha, Nam Seo Goo
openaire   +1 more source

Resonance frequency in patellar tendon

Scandinavian Journal of Medicine & Science in Sports, 2007
The aim of this study was to the measure resonance frequency of the patellar tendon in order to determine whether the resonance frequency exists in the soft tissue of the human body. A vibrator was attached to the medial aspect of the tibia of 10 healthy subjects to provide different frequencies of vibration, and an accelerometer was attached to the ...
T-G, Wang, T-Y, Hsiao, C-L, Wang, Y-W, Shau   +3 more
openaire   +2 more sources

Resonant frequencies of standing humans

Ergonomics, 1997
Many forms of industrial illness are thought to result from the effects of vibration on the human body. Prolonged exposure causes undue stress and discomfort. At the human whole-body resonant frequency there is maximum displacement between the organs and the skeletal structure and thus this is one frequency of vibration that should be minimized in the ...
J M, Randall, R T, Matthews, M A, Stiles
openaire   +2 more sources

Enhancement resonators for frequency combs

2006 IEEE LEOS Annual Meeting Conference Proceedings, 2006
The development of high finesse resonators for broadband frequency combs enabled the extension of the versatile frequency comb technique into the extreme ultraviolet with all its implications. We describe new developments in this field.
Rauschenberger, J., Ozawa, A., Gohle, C., Stein, B., Graf, R., Fernandez, A., Apolonskiy, A., Udem, T., Krausz, F., Hänsch, T.   +9 more
openaire   +2 more sources

Ultrahigh Frequency Nanotube Resonators

Physical Review Letters, 2006
We report carbon-nanotube-based electromechanical resonators with the fundamental mode frequency over 1.3 GHz, operated in air at room temperature. A new combination of drive and detection methods allows for unprecedented measurement of both oscillation amplitude and phase and elucidates the relative mobility of static charges near the nanotube.
H B, Peng, C W, Chang, S, Aloni, T D, Yuzvinsky, A, Zettl   +4 more
openaire   +2 more sources

Method of detecting resonant frequency, method of selecting resonance frequency, and device for detecting resonant frequency sensor

The Journal of the Acoustical Society of America, 2008
A device for detecting a resonant frequency comprises a sound source, a switch, a mixer, and a sound meter. The switch and mixer are capable of switching between a first state in which the switch and mixer output a measurement signal and a second state in which the switch and mixer output a synthesized signal containing the measurement signal and the ...
openaire   +1 more source

Prediction of ulnar resonant frequency

Journal of Biomechanics, 1975
Abstract As an extension of a previously reported study, 3 models were evaluated for prediction of ulnar resonant frequency given length, mineral content, and width in 210 subjects. The ulna was modeled as a homogeneous, isotropic cylindrical tube. For 2 of the models, the ulna was attached to rigid supports at each end—one by hinges (Model I) and ...
P V, Spiegl, J M, Jurist
openaire   +2 more sources